Is it normal to still feel burning and a hot face 9 days after CO2 fractional?

It can take several weeks to settle. I recommend following up with a cosmetic dermatologist for after care recommendations. I recommend skin care with vitamin c, b5 hydrator, silicone based scar gels with growth factors and enzymatic washes with papaya enzyme to give improvement. PDT therapy can calm inflammation. Sun protection is essential. Lasers like Co2 work best in combination with other treatments in order to improve the skin's texture and collagen. After Co2, I recommend adding fraxel lasers, microneedling/prp, and Cosmelan treatments to get the most improvement. Best, Dr. Emer